Function markIssueAsDone

Mark an issue line in a curated list as done with strikethrough + Done sub-bullet (#1299).

markIssueAsDone(
    content: string,
    opts: { issueUrl: string; prStatus: string; prUrl: string },
): {
    content: string;
    marked: boolean;
    reason?: string;
    reasonCode?: MarkDoneNoOpReason;
    remainingUnderRepo: number;
    repoHeadingStruck: boolean;
}
Pure transform — exposed for unit testing.
Parameters
- content: string
- opts: { issueUrl: string; prStatus: string; prUrl: string }
Returns {
    content: string;
    marked: boolean;
    reason?: string;
    reasonCode?: MarkDoneNoOpReason;
    remainingUnderRepo: number;
    repoHeadingStruck: boolean;
}
- content: string
- marked: boolean
- Optionalreason?: string
- OptionalreasonCode?: MarkDoneNoOpReason
  Set only when marked is false — why nothing changed.
- remainingUnderRepo: number
- repoHeadingStruck: boolean
- Defined in commands/list-mark-done.ts:135